x86: Move find_smp_config() earlier and avoid bootmem usage

Move the find_smp_config() call to before bootmem is initialized.
Use reserve_early() instead of reserve_bootmem() in it.

This simplifies the code, we only need to call find_smp_config()
once and can remove the now unneeded reserve parameter from
x86_init_mpparse::find_smp_config.

We thus also reduce x86's dependency on bootmem allocations.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <4B0BB9F2.70907@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 5 insertions, 5 deletions

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index e3eae5965e4..cdb6a8a506d 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -913,6 +913,11 @@ void __init setup_arch(char **cmdline_p)
 
         early_acpi_boot_init();
 
+        /*
+         * Find and reserve possible boot-time SMP configuration:
+         */
+        find_smp_config();
+
 #ifdef CONFIG_ACPI_NUMA
         /*
          * Parse SRAT to discover nodes.
@@ -927,11 +932,6 @@ void __init setup_arch(char **cmdline_p)
 
         initmem_init(0, max_pfn, acpi, k8);
 
-        /*
-         * Find and reserve possible boot-time SMP configuration:
-         */
-        find_smp_config();
-
 #ifdef CONFIG_X86_64
         /*
          * dma32_reserve_bootmem() allocates bootmem which may conflict